Truck and bolster mechanism.



N0. 826,688. PATBNTBD JULY 24, 1906 G. H. POOR & H. STABELL. TRUCK AND BOLSTER MECHANISM. APPLICATION FILED MAR. 6. 1905.

' 2 SHEETS-SHEET W T V u z Q a n 5 L, j My mims n No. 826.688. PATBN'TED JULY 24, 1906. G, H- LOOK '& H. STABELL.

TRUCK AND BOLSTER MECHANISM. APPLICATION TILED runs. 1905.

r 2 SHEETS-SHEET 2.

.y a f L9 a ing the car, permit it to rea UNITED STATES GEORGEH. POOR AND HALVDAN PATENT OFFICE.

STABELL, OF'CHICAGO, ILLINOIS,

- A SIGNORS TO SAMUEL W. MCMUNN, OF.CHI( AGO, ILLINO IS.

rnuox AND aoLsren MECHANISM.

Specification of Letters. Patent.

Application filed larulimlflllfi. Serial No. 248,671. I

Be it known that we, GEORGE H. POOR and HALVDAN STABELL, citizens of the United States, residing at Chicago, Illinois, have invented certainnew and useful Improvements inTruck and Bolster Mechanisms, of which the following is a specification.

This invention relates to that class of body-' bolsters and truck mechanisms used in con' nection with railway-cars.

It relates particularly to the side bearing mechanism by which the desired fiexure may be obtained between the. arts when thecaris taking curves and w en stopping. and

starting the car.

It relates, further, to the centering mechanism by meansof which the desired free* dom of movement of the truck with relation to the car-body in all directions both longitudinally and transversel is rendered ossible and whereby the true and carbo are centered or brought back to and ieldmgl' maintained in'normal position, an the ordinary truck-bolster and center supporting 25 hearing dispensed with.

The principal object of the invention is to provide a simple, economical, and efficient body-bolster and truck mechanism for rail way-c ars comprising side bearings and centenng mechanism adapted to permit the desired freedom of movement of the truck and car-body with relation to each other in all directions both longitudinally and transversely, so as to minimize the shocks and strains to thetruok when sto ping and startdi y adjust itself to the curves of the track, and automatically center the truck and car or bring them to normal centered position by the action of the weight of the car upon the side hearings in 1 connection with the operation of the centering mechanism. 7 1

.A further object is to dispense with the usual truck-bolster and center supportingbearing.

A further object is to provide a bolster of this character with simple, economical, and

efliclent side bearings.

Other-and further objects will appear from an examination of the drawings and the followingdescription and claims.

hereinafter described and claimed.

a cross-sectional elevation taken through a anism in elevation and the undcrframing in dotted outline; Fig. 2, a Ian-view of the same Fig. 3, an enlarge sectional detail taken onine 3 of Fig. 2 looking in the directional detail taken through the mechanism the arrow; an Fi 5, a similar view showing the centering mec amsm, taken on line 5, of

provements we will only herein illustrate and describe that which we consider to be new, taken in connection with so much that is old as willproperly disclose the invention to others and enable those skilled in the art to'practice the same, leaving out of. consideration other and well-known mechanisms which if set forth herein would only tend 'to confusion, prolixity, and ambiguity.

we provide a body-bolster, preferably formed made 0 metal and cambered at its lower suifacefrom the centento each end, which lower surface is provided with metal anglebars b.' This body-bolster is securedto the usual longitudinalsills c inany desired or well-known manner and supports such sills.

- To dispensewith the usual truck-bolster and center supporting-bearing is, asalready suggested, one of the objects of our invention, and inorder to accom lish' this transom mechanism is provide consisting of formed of sheet metalhaving u per flanges 2 and lower flanges 3 and secured at each end to the side frames 4 of the truck, such side frames being formed of vertical side and'horicured firmly to the ends of the transoms, so as to form therewith a strongand ri id truck-frame. The truck-frame is provi ed at or near each end of eachtransom with cup-shaped side bearing-pockets. e, formed, preferably, of chilled cast-iron and secured to the transom by means of rivets. These side bearing -..pockets' are each provided with detachable convex or parti-sphcrical bearing-blocks g at the bottom' thereof,

: Patented July 24, 190.6.

In the accompanying drawings, Figural is car, showing the bolster and transomrnechtion ofthe arrow; Fig. 4, an enlarged sec-.

on line 4 of Fi 1 looking in the direction of transom side portions d, each preferably zontal upper and lower integral portions se-' a Fig. 2. v

- n illustrating and describing these. im

f In constructing a bolster and truck mech amsm in accordance with these improvements "of an upper inverted-U-shaped portion a,

which may be removed whenever desired or necessary. The under portion of the bodybolster is provided at or near each end with cast-metal inverted-cup-shaped portions arranged immediately above the truck or transom side pockets, each having convex or parti-spherical bearing-surfaces h of the same curvature as those of the transom side bearing-blocks above described.

Arranged between each of the side bearings of the body-bolster and those of the truck or transoms are vertical supporting rockerbars 1', the upper and lower surfaces of each of which are convex, so as to engage the convex bearingsurfaces of the bodybolsterand transom side bearings, respectively. The engaging surfaces of the upper and lower ends of these supporting rocker-bars are of the same curvature as that of the convex bearing-blocks which they engage, although this curvature may be varied somewhat. The curvature should, however, be such that the complete sphere of which it forms a section would greatly exceed in diameter the len th of the rocker-bar. By this means the rooting of the bar in any direction will raise the body-bolster or car, with the result that the weight of he car will at all times tend to force the rocker-bars to normal vertical position and maintain the truck and car yieldingly in normal position. To assist these rocker-bars in holding their positions in the respective, bearings, the upper portions are provided with parti-spherical projectionslc, which extend into corres )onding sockets in the side bearings of the ody-bolster. The upper portions of the blocks of the transom side bearings are provided with parti-spherical projections l, each of which engages cortheir relative positions and at the same time responding recesses in the adjacent parts of the supporting rocker-bars and assists in retaining the arts in operative position. These projections also increase the bearingsurface when in normal position.

To further assist in holding the parts in permit the necessary flexure or movements thereof, the body-bolster is provided with a centrally-a1ranged king-bolt m, attached thereto by means of rivets or in any other desirable way, so as to depend from the upper body or web portion of such body-bolster.

It is desirable that the king-bolt', and thereby the body-bolster, should be so connected with the truck-frame or transom as to permit the movements of the car-body and truck in all directions, both longitudinally and transversely, within certain limits,'as above su gested, and that the weightof the ear shou d e supported upon the side bearings and not by means of the mechanism which connects the king-bolt with the truck, as hereinafter described. It is also desirable, as already sug ges ted, to provide suitable means for centering the 'car and truck with relation to each other,

or, in other words, for swinging the truck to normal position and maintaining it yieldingly in such position. In order to accomplish this, a centering-block 1", provided with a circular central perforation or socket portion 8, is mounted rockingly upon what We will term a centering-block-supporting plate p, which is secured to the transom of the truck and ,rovided with an upwardly-extending annuar flange q, adapted to form a guard or socket into which the lower end of the centeringblock extends. This centering-block-supporting plate is provided with a central perforation through which a headed securing-pin 15 extends. The upper head portion of thls securing-pin is mounted in the socket of the centering-block and extends downward loosely through the bottom of such block and its supporting-plate q, as shown in Fig. 5. The lower end of this securing-pin is provided with a washer 5, and a compressible spring 11) is mounted upon and encircles the securingpin between such washer and the bottom of the centering-block-supporting plate. The washer, and thereby the spring, is held in place upon the pin by means of a nut o upon the threaded end a of such pin, and b turning the nut in the desired direction t 1e tension of the spring may be readily regulated. The mouth of the socket portion of the centering-block is of sufficient .dimensions, as already suggested, to permit a limitedmovement of the king-bolt therein, and the perforations in the bottom of the centerin block and its supporting-plate are of suc h diameter as to permit the securing-pin to extend loosely therethrough and have a limited amount of play to conform to the position of the centering-block. It will be seen that the securing-pin, with its nut and spring, is the means for connecting the centering-block to its support. The centerin -block is therefore permitted to tilt or roe to a limited ex tent, conforming to the movement of the car.

By this arrangement it will be readily seen that the initial movement of the bodybolster or car-body in any direction with relation to the truck will be yieldingly resisted by the centering-block and its spring mechanism. ,It will also be noted that the tendency =ot the spring when the centeringblock tipped in any direction will be to return such centering-block, and thereby the body-bolster and truck, to normal position.

By the above arrangement it will be seen that while the movement of the bod bolster and car-frame with relation to t e truck is permit tedin all directions, both longitudinally and transversely of the ear, such movements are yieldingly resisted by the centering-block and its spring mechanism and also by reason of the curvature of the engaging surfaces between the ends of the rockerars and the side bearingsof the body-bolster and transoms, respectively. lit

l l l is necessary, however, that means be pro-' vided for positively limiting such movements and that the connections between the bod bolster and truck may effectually resist t e severest shocks to which such cars are subject in operation. To accomplish this, the transom is provided with a top center plate 6, which forms a reinforcement or connecting member for the top center portions of the 1'0 transom. This center plate is provided with a central perforation 7 for recelvmg the centering-block and serves as a flange forenimitmg 'its movement in all directionsbot r 5 longitudinally and transver sel of the car.

The upper flanged portions of t e side frames of the truck serve in a similar manner .to posi-' tively limit any unusually extended movement'of the rocker-bars laterally, such as so might otherwise throw. the parts out'of op-' erative osition.

Itwi of course be'understood that a luralit of trucks with be .and b0 ster mec a'nism, as above described are" employed for each car and that all the side earmg mechanisms coo erate with each other and with thecentra centering devices in accomplishing the objects of the invention.

We claim 3o 1. In mechanisms of the class described,

the combination of a body-bolster, a cartruck, a centering-block, and yield' means connecting the centering-block an truck, whereby the block is permitted to rock or 3 5 tilt to a limited extent.

' the combination of a body-bolster, 'a car-' truck provided with a transom, a centerin 4 5 block mounted upon such transom and yieldingly connected with the body-bolster, and

resilient means for yieldingly holdin such centering-block in normal position whi e permittin it to be moved in any direction longi- 5o tudina ly or transversel of the car.

4. In mechanisms 0 the class described,

the combination of a body-bolster, a cartruck provided with a transom, a centeringblock mounted upon the transom and yiel ingly connected with the body-bolster, and a spring connected'with such centering-block for eldingly holding it in normal position whil e permitting its movement agalnst the tension of. such s ring mechanism.

5. In mechanisms of the class described,-

the combination of a body-bolster, a cartru'ck rovided with atransom, a centering- ,block etween the transom and body-bolster, a centering-block-supporting plate upon which such centering-block is mounted, and

aging the. centering-block and positively.

t, a car-truck provided wit a transom, a centering-block movthe combination of a bod1y-bolster provided ably mounted upon such transom beneath I the body-bolster and provided with a central opening for loosely receiving such king-bolt,

and resilient means for yieldingly securing such centering-block on the transom.

7. In mechanisms 0 the class described the combination of a hody-bolster provided with a de ending kingbolt, a car-truck provided wit a transom, a centering-block movabl mounted upon the transom beneath the body-bolster and provided with a central opening for loosely receiving such king-bolt t erein, a supporting-plate for supporting such centeringlock upon the transom, a securing-pin secured to such centering-block 'and extending through such block-su port ing plate, an a spring connected wit such securingin and in ,operative engagement with the lock-supporting plate.

8'. In mechanisms of the class described, the combination of a supporting-framework provided with body-bolster, a truck mounted eneath such suppprting-framework and provided with side earin s, and a centerlngblock movabl mounterf upon such truck for yieldingly ho ding such body-bolster in op er'ativep'osition.

9. In mechanisms of the class described, the combination of a-body-bolster and truck each pro'vided with side bearings, and rockerbars mounted between such side bearings, such rocker-bars and side bearings being providedwith parti-spherical convex surface portion' there etween.

10. In mechanisms of'the class described, the combination of a body-bolster and truck each rovided with side bearings having convex bearing-surface portions, and rockerbars mounted between such side-bearings and provided with 'parti-spherical convex bearing-surface portions in contact with the convex bearing-surface portions of. such side bearin s respectively.

11. In mechanisms of the class described, the combination of-a body-bolster'and truck each rovi'ded with side bearings having con vex bearing-surface portions, and rockerbars mounted between such side bearings and provided with parti-spherical bearing-surfaces at each end thereof forming sectlons of a sphere of eater diameter than the length of such roc er-bars whereb the rocking of such bars in any direction ongitudinally or transversely of the car will tend to raise the body-bolster and thereb the car-body.

12. In mechanisms 0 the class described, thecombination of a body-bolster, a truck provided with transom mechanism having a it I i exams central opening in its upper portion, and a transom mechanism, plate p01.-

centering-block extending through such cention. mounted upon such. tmnsom nice-him tral o eni and 'cldingly' e aging sue-h ism rcvided with a perforation thmu h bodyolst i wh ic such centering-Hm]; extqngls,

5 13. Inmechanisms of the class described, GEO

the combination .of a b0dv-bolster provided v with a' depending king bolt, a truck provided D 1 v with transom mechanism, a ceritfing-block Witnesses: i rovided with an opening for receiving such I C. E. 1o King-bolt and movably mounted upon such MARQUIS EATQN; 

